<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        ul{
            list-style-type: none;}
        *{margin:0;padding: 0;}
        .box {
            margin: 100px auto;
            width: 600px;
            height: auto;
            border:1px solid #333;
            padding: 30px 0;
        }
        textarea {
            width: 450px;
            resize: none;  /*防止用户拖动 右下角*/
        }
        .box li {
            width: 450px;
            line-height: 30px;
            border-bottom:1px dashed #ccc;
            margin-left: 80px;
        }
    </style>
</head>
<body>
<div class="box">
    微博发布: <textarea name="" id="" cols="30" rows="10"></textarea>  <button>发布</button>

</div>
</body>
</html>